Xenocephalites
Encyclopedia
Xenocephalites is an extinct ammonoid cephalopod genus from the early Middle Jurassic belonging to the suborder Ammonitina
and to the superfamily Stephanocerataceae
.
Ammonitina
The Ammonitina comprises a diverse suborder of ammonoid cephalopods that lived during the Jurassic and Cretaceous periods of the Mesozoic Era. They are excellent index fossils, and it is often possible to link the rock layer in which they are found to specific geological time periods.The shells of...
and to the superfamily Stephanocerataceae
Stephanocerataceae
Stephanocerataceae is a superfamily of middle Jurassic ammonoid cephalopods within the order Ammonitida containing diverse forms, generally with sharp ribbing and complex suture lines...
.